Infiniti QX56 (Z62). Manual - part 510

EC-18

< SYSTEM DESCRIPTION >

[VK56VD]

COMPONENT PARTS

BODY COMPARTMENT

1.

A/F sensor 1 (bank 2)

2.

A/F sensor 1 (bank 1)

3.

Heated oxygen sensor 2 (bank 1)

4.

Heated oxygen sensor 2 (bank 2)

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COMPONENT PARTS

EC-19

< SYSTEM DESCRIPTION >

[VK56VD]

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Component Description

INFOID:0000000006217657

1.

ASCD steering switch
ICC steering switch

2.

Snow mode switch

3.

Fuel level sensor unit and fuel pump 
assembly (with fuel tank temperature 
sensor)

4.

Fuel pump control module (FPCM)

5.

EVAP canister vent control valve

6.

EVAP canister

7.

EVAP control system pressure sen-
sor

8.

Stop lamp switch

9.

ASCD brake switch
ICC brake switch

10. Accelerator pedal position sensor

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Component

Reference

ECM

EC-23, "ECM"

Malfunction indicator lamp (MIL)

EC-30, "Malfunction Indicator Lamp (MIL)"

Ignition coil with power transistor

EC-29, "Ignition Coil With Power Transistor"

Accelerator pedal position sensor

EC-21, "Accelerator Pedal Position Sensor"

Mass air flow sensor

EC-31, "Mass Air Flow Sensor (With Intake Air Temperature Sen-
sor)"

Intake air temperature sensor

Electric throttle control actuator

EC-23, "Electric Throttle Control Actuator"

Throttle control motor relay

Throttle control motor

Throttle position sensor

Crankshaft position sensor

EC-23, "Crankshaft Position Sensor"

Camshaft position sensor

EC-22, "Camshaft Position Sensor"

Engine coolant temperature sensor

EC-25, "Engine Coolant Temperature Sensor"

EC-20

< SYSTEM DESCRIPTION >

[VK56VD]

COMPONENT PARTS

High pressure fuel pump

EC-28, "High Pressure Fuel Pump"

Low pressure fuel pump

EC-30, "Low Pressure Fuel Pump"

Fuel pump control module (FPCM)

EC-27, "Fuel Pump Control Module"

Fuel rail pressure sensor

EC-27, "Fuel Rail Pressure Sensor"

Low fuel pressure sensor

EC-30, "Low Fuel Pressure Sensor"

Fuel injector

EC-26, "Fuel Injector"

Fuel level sensor

EC-26, "Fuel Level Sensor"

Fuel tank temperature sensor

EC-27, "Fuel Tank Temperature Sensor"

A/F sensor 1

EC-21, "Air Fuel Ratio (A/F) Sensor 1"

A/F sensor 1 heater

Heated oxygen sensor 2

EC-27, "Heated Oxygen Sensor 2"

Heated oxygen sensor 2 heater

Manifold absolute pressure sensor

EC-31, "Manifold Absolute Pressure Sensor"

Knock sensor

EC-30, "Knock Sensor"

Engine oil temperature sensor

EC-25, "Engine Oil Temperature Sensor"

Power steering pressure sensor

EC-31, "Power Steering Pressure (PSP) Sensor"

Electrically-controlled cooling fan coupling

EC-24, "Electrically-controlled cooling fan coupling"

Intake valve timing control solenoid valve

EC-29, "Intake Valve Timing Control Solenoid Valve"

VVEL control module

EC-32, "VVEL Control Module"

VVEL actuator motor relay

EC-32, "VVEL Actuator Motor Relay"

VVEL actuator motor

EC-32, "VVEL Actuator Motor"

VVEL control shaft position sensor

EC-32, "VVEL Control Shaft Position Sensor"

EVAP control system pressure sensor

EC-26, "EVAP Control System Pressure Sensor"

EVAP canister vent control valve

EC-26, "EVAP Canister Vent Control Valve"

EVAP canister purge volume control solenoid valve

EC-26, "EVAP Canister Purge Volume Control Solenoid Valve"

Battery current sensor (with battery temperature sensor)

EC-22, "Battery Current Sensor (With Battery Temperature Sen-
sor)"

Refrigerant pressure sensor

EC-32, "Refrigerant Pressure Sensor"

Stop lamp switch

EC-21, "ASCD Brake Switch & Stop Lamp Switch"

ASCD brake switch

ASCD steering switch

EC-21, "ASCD Steering Switch"

Information display

EC-49, "AUTMATIC SPEED CONTROL DEVICE (ASCD) : Switch 
Name and Function"

Stop lamp switch

EC-29, "ICC Brake Switch & Stop Lamp Switch"

ICC brake switch

ICC steering switch

EC-29, "ICC Steering Switch"

Component

Reference

COMPONENT PARTS

EC-21

< SYSTEM DESCRIPTION >

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Accelerator Pedal Position Sensor

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The accelerator pedal position (APP) sensor is installed on the
accelerator pedal assembly. The sensor detects the accelerator
position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signals to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for engine operations such as fuel cut.

Air Fuel Ratio (A/F) Sensor 1

INFOID:0000000006217659

DESCRIPTION

The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a heater
in the element.
The sensor is capable of precise measurement   = 1, but also in the lean and rich range. Together with its
control electronics, the sensor outputs a clear, continuous signal throughout a wide   range.
The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is
applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density
in rich.

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 760

°

C (1,400

°

F).

A/F SENSOR 1 HEATER

A/F sensor 1 heater is integrated in the sensor.
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element within the specified range.

ASCD Brake Switch & Stop Lamp Switch 

INFOID:0000000006217660

Stop lamp switch and ASCD brake switch are installed to brake pedal bracket.
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).

ASCD Steering Switch

INFOID:0000000006217661

ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.

ASCD Indicators

INFOID:0000000006217662

ASCD operation status is indicated by CRUISE indicator in combination meter.
ECM transmits the ASCD status signal to the combination meter via CAN communication according to ASCD
operation.

PBIB1741E

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